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[" We28If Sndenotes the sum of first n t...

[" We28If Sndenotes the sum of first n terms of an A.P Prove that "S_(00)=3(S_(00)-S_(10))],[" Coosedyst be following pair of equation."]

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If S_(n) denotes the sum of first n terms of an A.P.prove that S_(12)=3(S_(8)-S_(4))

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